I haven't been able to get a client certificate working on Android at all (stock 4.2.2 with Chrome and Chrome Beta). Perhaps someone here has gotten them to work? I've posted in several forums and haven't found anyone that's gotten them to work.
It definitely works with recent Chrome versions. I use this daily to check my professional webmail on an Android 4.2.2. Once you have provisioned a PKCS#12 into your keystore, open Chrome onto an HTTPS web site that requires certificates from your issuer and the certificate choice dialog pops up.
